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Old 01-09-2018, 08:43 PM   #1
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Attic Insulation is Wet - Any Idea Why?


I have a two story colonial home. I noticed on the upstairs drywall ceiling there was a water stain. This was odd because I have a new roof and there is no plumbing vent pipe or any type of roof penatration above the stain. So I crawl up into the attic and discovered that a lot of my insulation is wet! Itís almost like moisture is getting trapped in my atttic. Has anyone experienced this before or know what is causing this? Photos have been attached.

Thank you.
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Attic Insulation is Wet - Any Idea Why?-fdeebcc9-644e-4b60-bd34-849e6540edec.jpg   Attic Insulation is Wet - Any Idea Why?-44b0f5bb-c13e-420e-9e72-b7054f9fefeb.jpg   Attic Insulation is Wet - Any Idea Why?-decac600-6420-4000-9f76-acf11d981999.jpg   Attic Insulation is Wet - Any Idea Why?-4d3542e8-ed08-4301-89b5-3cdae9a25318.jpg  
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Old 01-09-2018, 08:52 PM   #2
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Re: Attic Insulation is Wet - Any Idea Why?


There may be a few reasons for the moisture but we can see a few things wrong that will not help.
Any barrier should be on the warm side and it looks like you have paper side up insulation.
We do not see air chutes that would bring air from soffet vents.
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Old 01-09-2018, 08:52 PM   #3
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Re: Attic Insulation is Wet - Any Idea Why?


Hi air force and welcome to the forum,
Oh My, it looks like the batt insulation is installed upside down, Kraft facing on top. in a cold climate the Kraft paper goes to the warm side.

Is there another layer of insulation under that and someone just added the extra on top?

Is there moisture on the underside of the roof, it doesn't look like it.

With Kraft on top the moisture that passes through the drywall, which is a small amount, is getting trapped by that paper (vapor barrier).

Let me know what is under what ae are looking at, the layers?

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Old 01-09-2018, 08:59 PM   #4
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Re: Attic Insulation is Wet - Any Idea Why?


Thanks for your replyís. I gladly appreciate it. There is only one layer of insulation. Itís all r-30 insulation. There is no moisture on the underside of the roof.


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Old 01-09-2018, 09:07 PM   #5
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Re: Attic Insulation is Wet - Any Idea Why?


So whats the best way to correct this? Install air shutes, flip the insulation so it correct and replace the wet insulation?


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Old 01-09-2018, 09:10 PM   #6
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Re: Attic Insulation is Wet - Any Idea Why?


Lets talk ventilation that Neal mentioned. We are looking for soffit vents for low and a ridge or gable vents for up high. What do you have?

Bud

Flip and replace is correct. Batts don't always block the soffits like blown in so may not be needed at this point.

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Old 01-09-2018, 09:11 PM   #7
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Re: Attic Insulation is Wet - Any Idea Why?


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Thanks for your replyís. I gladly appreciate it. There is only one layer of insulation. Itís all r-30 insulation. There is no moisture on the underside of the roof.


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Toward the peak at the back of the house you should have vents thru the roof or slots cut in the sheeting just under the peak of the roof.

Watch for nails from the roofing but you need to see if there is cool air in the soffet area on the other side of the outside wall that can be brought into the space.
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Old 01-09-2018, 09:16 PM   #8
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Re: Attic Insulation is Wet - Any Idea Why?


The ridge of roof does have a slot. It also has a vented ridge cap. The overhang has vented soffit as well.


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Old 01-09-2018, 09:24 PM   #9
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Re: Attic Insulation is Wet - Any Idea Why?


Lol. The attached garage is the same way.


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Old 01-09-2018, 09:32 PM   #10
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Re: Attic Insulation is Wet - Any Idea Why?


Where ever this came from you do not have enough venting to keep the attic dry. The wet insulation need to be removed it may dry but wants to be watched carefully for mold growth. I would remove he paper and move it to the garage for drying. Keep moving and fluffing it so it can dry quickly.

It looks like enough water to be a leak but you would expect that would be more concentrated in one spot. Do you have bathroom fan or something discharging in the attic?
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Old 01-09-2018, 09:37 PM   #11
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Re: Attic Insulation is Wet - Any Idea Why?


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The ridge of roof does have a slot. It also has a vented ridge cap. The overhang has vented soffit as well.


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We need the chutes installed.

New roof, request the roof come back. may not be his problem but an experience set of eyes would be a good plus.
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Old 01-09-2018, 09:38 PM   #12
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Re: Attic Insulation is Wet - Any Idea Why?


We have two heat lamps that we run frequently. They have a fan that discharged into the attic.


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Old 01-09-2018, 09:38 PM   #13
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Re: Attic Insulation is Wet - Any Idea Why?


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Lol. The attached garage is the same way.


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Heated garage?
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Old 01-09-2018, 09:43 PM   #14
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Re: Attic Insulation is Wet - Any Idea Why?


Garage is not heated. Just the insulation was installed the same way.


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Old 01-09-2018, 09:49 PM   #15
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Re: Attic Insulation is Wet - Any Idea Why?


It looks like Iíll atleast be doing the following:
1. Installing Air Chutes
2. Flipping the good insulation so the paper is facing down
3. Replacing the wet/bad insulation

Anything else that should be performed?


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